Scaffold



July 2, 1935. A, KASK SCAFFOLD Filed Feb. 7. 1934 lNvENToR ELEXAHDERKASK l'7 z?? A RNEY.

Patented July 2, 1935 UNITED STATES PATENT OFFICE 'Application February7,

2 Claims.

This invention relates to improvements in scaifolding and has particularreference to a scaifold for use by painters, decorators, plasterers andthe like.

The principal object of the invention is to produce a portablescaifolding which is simple to manipulate.

A still further object is to produce a scaffolding which may be used asa single unit or in combination with other units.

An additional object is to produce a scaifold which is portable andextensible.

In the accompanying drawing' forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame,

Fig. 1 is a side elevation of my scaffold as the same would appear inuse,

Fig. 2 is an end elevation of a pair of my devices as the same wouldappear' when joined one to the other,

Fig. 3 is a side elevation of one of the units of Fig. 1 in closedposition, and

Fig. 4 is an enlarged detail cross sectional view on the line 4-4 ofFig. 2.

Decorators, plasterers and the like usually employ saw-horses of variousheights, upon which planks are placed, and the user then stands upon theplanks to reach high elevations. These sawhorses are usually of standardheight and the result is that in rooms of various heights it is oftendifficult to reach the highest points or the scaffold may be too closeto the ceiling to work comfortably. Applicant has, therefore, devised ascaffold which is adjustable.

In the accompanying drawing, the numerals 5 and 6 refer to upper slidingleg Sections loosely secured together by a bolt 1. This bolt also servesto pivot a strut 8 to which is pivotally secured braces 9 and l I. Thesebraces have bayonet slots at their lower ends, which engage pins |3 andIll, respectively, carried upon the legs 5 and 6. Slidably mounted uponthe legs 5 and 6 are lower leg Sections |6 and l'l. At 18 I have shown apivoted link which extends between the bottom of the legs 5 and 6 and at2B I have shown clips which encircle the legs |6 and I'l. The numeral |9refers to a cord which passes over rollers 2| and 22 and has its lowerends connected as at 23 and 24 to the lower ends of the legs 5 and 6.Secured to the upper end of the legs |6 and I'i, are sliders 26 whichsurround the legs 5 and 6 and have slots 21 formed therein through whichpins 28 may be passed into holes 29 formed in the legs 5 and 6.

The result of this construction is that when the parts are in theposition as shown in Fig. 1,

1934, Serial No. 710,188

the operator first swings the strut 8 vfrom its position parallel withthe legs to a position at right angles thereto as shown in Fig. 2. Thiscauses the braces 9 and to move so that their bayonet slots will engagethe pins |3 and Ill thus holding the strut in horizontal position. Bynow spreading the legs, the brace i8 will move from the position of Fig.3 to that of Fig. l and will hold the legs in proper spread position.The end of the strut 8 may now be placed against the wall and anotherunit set up after which a plank may be placed upon the strut. When twoor more units are used together, as illustrated in Fig. 2, the twostruts of the units are bolted together as shown at 3|, after whichplanks are laid upon these struts. When it is desired to elevate theunit, the operator grasps the rope 19 pulling downwardly in thedirection of the lower arrow of Fig. 1, which elevates the legs 5 and 6,after which pins 28 are inserted, thus holding the legs 5 and L 6 inelevated position.

It will thus be seen that I have produced a device which will accomplishthe above set forth objects.

Having thus described my invention, I claimz- 1. In a device of theclass described, a' pair of inner legs joined at their upper extremitiesand having clips arranged at their lower extremities, a strut pivotedbetween said legs, braces secured to said strut and engaging both saidlegs, slidable legs mounted on the outside of said inner legs and havingclips mounted at their upper ends and embracing the inner legs, linksconnecting the lower clips together, perforations in said inner legs andpins extendable through said upper clips and through said perforationsto hold said inner and outer legs in fixed relation, and means forelevating said inner legs relative to said outer legs.

2. In a device of the class described, a pair of inner legs joined attheir upper extremities and having clips arranged at their lowerextremities, a strut pivoted between said legs, braces secured to saidstrut and engaging both said legs, slidable legs mounted on the outsideof said inner legs and having clips mounted at their upper ends andembracing the inner legs, pulleys carried by said clips, linksconnecting the lower clips together, perforations in the edges of saidinner legs, and pins extendable through said upper clips and throughsaid perforations to hold said inner and outer legs in fixed relation,and means for elevating said inner legs relative to said. outer legs,said means embodying a looped cord having its free ends attached to saidlower clips and its intermediate section reaved over said pulleys.

ALEXANDER, KASK.

